/*
 * Copyright 2002-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.context.support

import org.junit.Assert.*
import org.junit.Test
import org.springframework.beans.factory.NoSuchBeanDefinitionException
import org.springframework.beans.factory.getBean
import org.springframework.beans.factory.getBeansOfType
import org.springframework.context.support.BeanDefinitionDsl.*
import org.springframework.core.env.SimpleCommandLinePropertySource
import org.springframework.core.env.get
import org.springframework.mock.env.MockPropertySource

@Suppress("UNUSED_EXPRESSION")
class BeanDefinitionDslTests {

    @Test
    fun `Declare beans with the functional Kotlin DSL`() {
        val beans = beans {
            bean<Foo>()
            bean<Bar>("bar", scope = Scope.PROTOTYPE)
            bean { Baz(ref("bar")) }
        }

        val context = GenericApplicationContext().apply {
            beans.initialize(this)
            refresh()
        }

        assertNotNull(context.getBean<Foo>())
        assertNotNull(context.getBean<Bar>("bar"))
        assertTrue(context.isPrototype("bar"))
        assertNotNull(context.getBean<Baz>())
    }

    @Test
    fun `Declare beans using profile condition with the functional Kotlin DSL`() {
        val beans = beans {
            profile("foo") {
                bean<Foo>()
                profile("bar") {
                    bean<Bar>("bar")
                }
            }
            profile("baz") {
                bean { Baz(ref("bar")) }
            }
        }

        val context = GenericApplicationContext().apply {
            environment.addActiveProfile("foo")
            environment.addActiveProfile("bar")
            beans.initialize(this)
            refresh()
        }

        assertNotNull(context.getBean<Foo>())
        assertNotNull(context.getBean<Bar>("bar"))
        try {
            context.getBean<Baz>()
            fail("Expect NoSuchBeanDefinitionException to be thrown")
        } catch (ex: NoSuchBeanDefinitionException) {
            null
        }
    }

    @Test
    fun `Declare beans using environment condition with the functional Kotlin DSL`() {
        val beans = beans {
            bean<Foo>()
            bean<Bar>("bar")
            environment({ env["name"].equals("foofoo") }) {
                bean { FooFoo(env["name"]!!) }
            }
            environment({ activeProfiles.contains("baz") }) {
                bean { Baz(ref("bar")) }
            }
        }

        val context = GenericApplicationContext().apply {
            environment.propertySources.addFirst(SimpleCommandLinePropertySource("--name=foofoo"))
            beans.initialize(this)
            refresh()
        }

        assertNotNull(context.getBean<Foo>())
        assertNotNull(context.getBean<Bar>("bar"))
        assertEquals("foofoo", context.getBean<FooFoo>().name)
        try {
            context.getBean<Baz>()
            fail("Expect NoSuchBeanDefinitionException to be thrown")
        } catch (ex: NoSuchBeanDefinitionException) {
            null
        }
    }

    @Test  // SPR-16412
    fun `Declare beans depending on environment properties`() {
        val beans = beans {
            val n = env["number-of-beans"]!!.toInt()
            for (i in 1..n) {
                bean("string$i") { Foo() }
            }
        }

        val context = GenericApplicationContext().apply {
            environment.propertySources.addLast(MockPropertySource().withProperty("number-of-beans", 5))
            beans.initialize(this)
            refresh()
        }

        for (i in 1..5) {
            assertNotNull(context.getBean("string$i"))
        }
    }

    @Test  // SPR-16269
    fun `Provide access to the context for allowing calling advanced features like getBeansOfType`() {
        val beans = beans {
            bean<Foo>()
            bean<Foo>()
            bean { BarBar(context.getBeansOfType<Foo>().values) }
        }

        val context = GenericApplicationContext().apply {
            beans.initialize(this)
            refresh()
        }

        val barbar = context.getBean<BarBar>()
        assertEquals(2, barbar.foos.size)
    }

    @Test  // SPR-17292
    fun `Declare beans leveraging constructor injection`() {
        val beans = beans {
            bean<Bar>()
            bean<Baz>()
        }
        val context = GenericApplicationContext().apply {
            beans.initialize(this)
            refresh()
        }
        context.getBean<Baz>()
    }

}

class Foo
class Bar
class Baz(val bar: Bar)
class FooFoo(val name: String)
class BarBar(val foos: Collection<Foo>)
